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    <title>Biometry for Fetal Echo</title>
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            <h2>
                Fetal Biometry for Fetal Echocardiographers</h2>
            <hr />
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        <div class="span-18 last">
                <p><label for="input-ega" class="">
                        Enter EGA (weeks): </label><br/>
                        <input id="input-ega" align="middle" name="input-ega" onclick=""
                    type="text" />
                    <input id="Button1" type="button" value="Update" /></p>
                    
            <h3>
                Normal Values:</h3>
            <p>
                The normally developing fetus should have values that fall within these ranges <span
                    class="quiet">(5th - 95th percentiles)</span>:</p>
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            <p class="results">
            <strong>Thoracic Circumference (cm): </strong>
            <span id="thoracicCircumference">~</span>
            </p>
            <p class="results">
            <strong>Femur Length (mm): </strong>
            <span id="femurLength">~</span>
            </p>
                
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        <div class="references span-18 last">
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            <h4>
                References</h4>
            <dl>
                <dt><a class="external" href="http://www.ncbi.nlm.nih.gov/pubmed/3555087">Prenatal sonographic assessment of the fetal thorax: normal values.</a></dt>
                <dd>
                    Chitkara U, Rosenberg J, Chervenak FA, Berkowitz GS, Levine R, Fagerstrom RM, Walker
                    B, Berkowitz RL.<br />
                    Am J Obstet Gynecol. 1987 May;156(5):1069-74.</dd>
                <dt><a class="external" href="http://www.ncbi.nlm.nih.gov/pubmed/18348183">New charts for ultrasound dating of pregnancy and assessment of fetal growth: longitudinal
                    data from a population-based cohort study.</a></dt>
                <dd>
                    Verburg BO, Steegers EA, De Ridder M, Snijders RJ, Smith E, Hofman A, Moll HA, Jaddoe
                    VW, Witteman JC.<br />
                    Ultrasound Obstet Gynecol. 2008 Apr;31(4):388-96.</dd>
            </dl>
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    $('#input-ega').change(function() {
        var ega = parseInt($(this).val());
        if (!isNaN(ega)) {
            $('#thoracicCircumference').text(getTC(ega)).addClass('notice');
            $('#femurLength').text(getFL(ega)).addClass('notice');
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